Well an obvious recent attempt happened in America with their latest jobs numbers. The President tried to bully the record keeper to change the numbers. When that didn't work the President moved to fire the record keeper (the last I checked the record keeper still has their job).
As bad as the politicization of the BLS is, that's nowhere close to the original accusation that the formulas have been tampered with. Moreover the previous comment implied this was some sort of long standing practice, whereas the BLS firings only happened recently.
well, for one, there's 6 different formulas for unemployment/jobs numbers...
and they don't count ppl who stopped looking for work for whatever reason nor do they count underemployed ppl who are working, but still don't earn enough to live.